{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:02.306060", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2016-Aug-29_to_2016-Sep-02_351.0_20.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2016080000822}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 29 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 81517.54946087056}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Mali", "Mauritania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 20.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 351.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.25, 20.5], [-8.03, 21.03], [-7.5, 21.25], [-7.25, 21.15], [-7.0, 21.25], [-6.75, 21.15], [-6.5, 21.25], [-6.25, 21.15], [-6.0, 21.25], [-5.75, 21.15], [-5.5, 21.25], [-4.97, 21.03], [-4.75, 20.5], [-4.97, 19.97], [-5.5, 19.75], [-5.75, 19.85], [-5.82, 19.82], [-5.97, 19.47], [-6.32, 19.32], [-6.47, 18.97], [-7.0, 18.75], [-7.53, 18.97], [-7.75, 19.5], [-7.65, 19.75], [-7.68, 19.82], [-8.03, 19.97], [-8.25, 20.5]]]]}, "2016-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 19.0], [-10.53, 19.53], [-10.18, 19.68], [-10.03, 20.03], [-9.68, 20.18], [-9.53, 20.53], [-9.0, 20.75], [-8.75, 20.65], [-8.68, 20.68], [-8.53, 21.03], [-8.0, 21.25], [-7.75, 21.15], [-7.5, 21.25], [-7.25, 21.15], [-7.0, 21.25], [-6.75, 21.15], [-6.5, 21.25], [-6.25, 21.15], [-6.0, 21.25], [-5.75, 21.15], [-5.5, 21.25], [-4.97, 21.03], [-4.75, 20.5], [-4.97, 19.97], [-5.5, 19.75], [-5.75, 19.85], [-5.82, 19.82], [-5.97, 19.47], [-6.32, 19.32], [-6.47, 18.97], [-6.82, 18.82], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-7.82, 18.32], [-7.97, 17.97], [-8.5, 17.75], [-8.75, 17.85], [-9.0, 17.75], [-9.25, 17.85], [-9.5, 17.75], [-10.03, 17.97], [-10.18, 18.32], [-10.53, 18.47], [-10.75, 19.0]]]]}, "2016-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.25, 19.5], [-11.03, 20.03], [-10.5, 20.25], [-10.25, 20.15], [-10.0, 20.25], [-9.75, 20.15], [-9.68, 20.18], [-9.53, 20.53], [-9.0, 20.75], [-8.75, 20.65], [-8.68, 20.68], [-8.53, 21.03], [-8.0, 21.25], [-7.75, 21.15], [-7.5, 21.25], [-7.25, 21.15], [-7.0, 21.25], [-6.75, 21.15], [-6.5, 21.25], [-6.25, 21.15], [-6.0, 21.25], [-5.75, 21.15], [-5.5, 21.25], [-4.97, 21.03], [-4.75, 20.5], [-4.97, 19.97], [-5.5, 19.75], [-5.75, 19.85], [-5.82, 19.82], [-5.97, 19.47], [-6.32, 19.32], [-6.47, 18.97], [-6.82, 18.82], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-7.82, 18.32], [-7.97, 17.97], [-8.5, 17.75], [-8.75, 17.85], [-9.0, 17.75], [-9.25, 17.85], [-9.5, 17.75], [-10.03, 17.97], [-10.18, 18.32], [-10.53, 18.47], [-10.68, 18.82], [-11.03, 18.97], [-11.25, 19.5]]]]}, "2016-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.25, 19.5], [-11.03, 20.03], [-10.5, 20.25], [-10.25, 20.15], [-10.0, 20.25], [-9.75, 20.15], [-9.68, 20.18], [-9.53, 20.53], [-9.0, 20.75], [-8.75, 20.65], [-8.68, 20.68], [-8.53, 21.03], [-8.0, 21.25], [-7.47, 21.03], [-7.32, 20.68], [-6.97, 20.53], [-6.75, 20.0], [-6.85, 19.75], [-6.75, 19.5], [-6.85, 19.25], [-6.75, 19.0], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-7.82, 18.32], [-7.97, 17.97], [-8.5, 17.75], [-8.75, 17.85], [-9.0, 17.75], [-9.25, 17.85], [-9.5, 17.75], [-10.03, 17.97], [-10.18, 18.32], [-10.53, 18.47], [-10.68, 18.82], [-11.03, 18.97], [-11.25, 19.5]]]]}, "2016-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 18.97], [-11.25, 19.5], [-11.03, 20.03], [-10.5, 20.25], [-10.25, 20.15], [-10.0, 20.25], [-9.47, 20.03], [-9.25, 19.5], [-9.47, 18.97], [-10.0, 18.75], [-10.25, 18.85], [-10.5, 18.75], [-11.03, 18.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.660927937713836}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3708747708282725}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [31.494706180755145, 30.28832589398752, 29.18481499937957, 29.25996079446122, 29.561504081981695]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [30.834846932298035, 28.660673029620682, 26.576892180659684, 27.724241138907814, 29.519599326114246]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.440683186773988, -2.957812118563197, -3.9699939121970624, -3.520028843853919, -2.582246877071867]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7714902212826473, -3.779414377886326, -5.660927937713836, -4.398908854263709, -2.630695602025014]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5236358205766973, -1.714354694971444, -2.199236203991257, -1.965351228406453, -1.470563710286506]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8725015092545938, -2.207523491339648, -3.05798049156115, -2.463082784586746, -1.4757354403913732]}}